Abstract
Lymphomatoid papulosis (LyP) with DUSP22-IRF4 rearrangement on chromosome 6p25.3 is a newly identified subtype of LyP. It is characterized by an older age of onset, localized skin lesions, with good prognosis, and it resembles a hybrid of LyP types B and C in histopathology. A limited number of cases have been reported so far. In this article, we reported a case of a 72-year-old man with recurrent episodes of widespread multiple discrete papular or vesicular eruptions on a region of the head, trunk, and 4 extremities for about 3 years. Histopathological examination of a vesicle revealed a subepidermal blister with abundant atypical lymphocytes in the vesicular space, band-like infiltrates in the papillary dermis, along with epidermotropism and pilosebaceous structure involvement. Fluorescence in situ hybridization analysis further demonstrated DUSP22-IRF4 rearrangement on chromosome 6p25.3. A diagnosis of vesicular LyP with this rare subtype was made according to the clinical and pathological findings.
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